Brief FAQs Specs Question What should I do if a communication error occurs? Features Answer Follow the steps below to identify the problem: TopScan Pro 1) Check if the ignition is ON. 2) Check if the TopScan is securely plugged into the vehicle’s OBD-II port. Repair Information 3) Turn the ignition off. Then, turn it on after 10 seconds and continue the operation. 4) Check if the vehicle’s control module is defective. What's In The Box? Comp Chart FAQs